1323111320220 has 96 divisors (see below), whose sum is σ = 4093185374208. Its totient is φ = 317636948992.

The previous prime is 1323111320183. The next prime is 1323111320257. The reversal of 1323111320220 is 220231113231.

It is an interprime number because it is at equal distance from previous prime (1323111320183) and next prime (1323111320257).

It is a super-2 number, since 2×1323111320220² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28175844 + ... + 28222763.

It is an arithmetic number, because the mean of its divisors is an integer number (42637347648).

Almost surely, 2^{1323111320220} is an apocalyptic number.

1323111320220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323111320220 is an abundant number, since it is smaller than the sum of its proper divisors (2770074053988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1323111320220 is a wasteful number, since it uses less digits than its factorization.

1323111320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56398659 (or 56398657 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1323111320220 its reverse (220231113231), we get a palindrome (1543342433451).

The spelling of 1323111320220 in words is "one trillion, three hundred twenty-three billion, one hundred eleven million, three hundred twenty thousand, two hundred twenty".